package Request;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@WebServlet("/requestDemo4")
public class requestDemo4 extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        //获取请求头数据:referer
        String referer = req.getHeader("referer");
        System.out.println(referer);

        //防盗链
        if (referer != null) {
            if (referer.contains("/Servlet3_0")) {//正常访问
                System.out.println("播放电影");
            } else {//盗链
                System.out.println("播放失败,来源是盗链");
            }
        }
    }
}
